空气净化器

空 = 工 + 穴 : Mnemonic symbol: an air conditioner

空 = 工 + 穴 : In front of the engine, Karl Koala found some very special cave paintings. Using steel beams he constructs a protective cover. He also installs air conditioning to make the best environment possible to preserve the cave paintings.

Mnemonic symbol: a balloon. The Queen of Hearts is disappointed by her balloons. She expected them to float upwards, but in the space station's bathroom, They float randomly in all directions.

净 = 争 + 冫 : The grim reaper (争) is very annoyed by Joan of Arc (ji) eating popsicle after popsicle (冫) in the engine's bathroom ((e)ng4). She does not take care at all and repeatedly messes up the floor which the grim reaper has to clean (净) again and again.

净 = 争 + 冫 : The grim reaper (争) is very annoyed by Joan of Arc (ji) eating popsicle after popsicle (冫) in the engine's bathroom ((e)ng4). She does not take care at all and repeatedly messes up the floor which the grim reaper has to clean (净) again and again.

化 = 亻 + 匕 : Helga Horse and Rosa Luxemburg conduct an experiment in the ashram's bathroom. Using a transformer, they melt a ladle.

器 = 㗊 + 犬 : The Saint Bernard dog has been practising playing his bagpipe all day in the space station's bathroom. The Queen of Hearts is so annoyed that finally she grabbed a screwdriver as utensil to end this torture.